Kotak Mahindra Bank — complain about refund but not credited in my credit card initiated by the merchant against card no. [protected]

I made a transaction on 14 feb 2019 on one97 telecommunication for rs 1000/- and the same amount was initiated refund on 19 march 2019 by merchant, order id [protected] with reference no.[protected] and kotak mahindra bank confirm the receipt of amount to the merchant but it has not been credited in my card no. [protected], yet. A screen shot of the communication made between i and paytm in which paytm confirmed that kotak mahindra bank confirmed the receipt of amount rs 1000/- against above mentioned reference number, is attached for further verification.